android - 如何在选中复选框之前禁用 RadioGroup

Question

我有一个单选组，我不希望用户能够选择任何按钮，直到在我的应用程序中选择了一个特定的复选框。如果未选中该复选框，则会禁用 radio 组。我该怎么做。

Answer 1

真正的诀窍是遍历所有 subview (在本例中为:CheckBox)并将其称为 setEnabled(boolean)

这样的事情应该可以解决问题:

//initialize the controls
final RadioGroup rg1 = (RadioGroup)findViewById(R.id.radioGroup1);
CheckBox ck1 = (CheckBox)findViewById(R.id.checkBox1);

//set setOnCheckedChangeListener()
ck1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

    @Override
    public void onCheckedChanged(CompoundButton checkBox, boolean checked) {
        //basically, since we will set enabled state to whatever state the checkbox is
        //therefore, we will only have to setEnabled(checked)
        for(int i = 0; i < rg1.getChildCount(); i++){
            ((RadioButton)rg1.getChildAt(i)).setEnabled(checked);
        }
    }
});

//set default to false
for(int i = 0; i < rg1.getChildCount(); i++){
    ((RadioButton)rg1.getChildAt(i)).setEnabled(false);
}